Drupal 8.x

Hello,

I have a large Drupal 7 system that I built and maintain as my primary job.  Dozens of content types, many custom modules and a couple hundred thousand nodes.  The system is used by a couple thousand staff members of a regional school district.  I'm now faced with the looming challenge of needing to upgrade to Drupal 9.  I have begun this endeavor several times before and have found it to be an Everest challenge and have put the task aside in hopes that maybe I'll die before I have to do it which would save me a lot of stress.....

I have a user authorized to enter and modify the nodes he owns.
In the view of this content type I show the links for insertion and modification. So far, so good.
Now I need to check, based on a logical field if it can modify the node.
Ex .:
The content type has a logical field. If this field is false it can modify. If true it should hide the link to the edit (in the views), or in the form check this and prevent it from editing.
In the various readings I have done I have found this code but it does not work for me

Hello all,

         I have a site that I was working on for someone else. They actually didn't need the Captcha feature but I couldn't figure out how to remove it. I forget what was happening. Anyway, something went wrong with the Captcha and it isn't showing the image. That means that it is impossible to log in and try to use the administrative ara to try to remove the Captcha module. 

          Is there a way to get in that I don't know about that would let me login as the admin user? 

Hello,

I would like know if there is a module or way to be able to add style like 

direction: rtl;

 or 

style="direction: rtl;"

the reason for this is, to have fields with different direction or style. 

Hello i am looking for a requirements where in content listing view i need to show number of language content exist / feed for that content. Like I have a content type news and site is multi language (EN,DR,FR) now i want to show if for content 1 we feeded upto two languages content (en,de) so it show their language code or title

I am trying to automate the process of enabling/disabling the module for my Drupal-8 website. As far I could understand from the docs, Drupal saves the info related to the modules in the table config inside it's database (Drupal/sites/default/files/.ht.sqlite).